Carbureter.



F HOWE.

CARBURETER.

APPLICATION FILED JAN. 18. 1913.

1 2 37 5 1 9 Patented Aug. 21, 1917.

2 SHEETS-SHEET I.

F. HOWE.

CARBURETER.

APPLICATION FILED IAN-18,1913.

Patented Aug. 21, 1917 2 SHEETSSHEET 2.

. nuts, one upon the thumb screw, While the FREDRJ ICK HOXVE, OF ADRIAN, MICHIGAN.

GARBURETEB.

Specification of Letters Patent.

Patented Au". 21, 1917.

Application filed January 1.8, 1913. Serial No. 742,890.

To all whom it may concern:

Be it known that I, Flmoiuon Home, a citizen of the United States, residing at Adrian, in the county of Lenawee and State of Michigan, have invented a new and useful Carburetor; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use'the same.

This invention relates to a new and useful carbureter.

As one of the objects of the invention, it is the aim to provide a novel connection, including a double adjustment, between the air intake valve and the needle valve, which needle valve controls the intake or flow of gasolene into the carbureting chamber.

Means is also provided upon the stem of v the air intake valve, adapted to contact with the casing of the carbureter, to limit the intake valve in its movement.

The connection between the air intake valve and the needle valve (which controls the inflow of the gasolene) comprises a pivoted lever having a fork at one end adapted to engage a grooved collar upon the stem of the air intake valve. This grooved collar is threaded upon the stem, and by the adjustment of the collar relative to the lever, the said lever may be thrown in such wise, as to vary the movement of theneedle valve. The other end of said lever extends into a slot of an enlargement upon the needle valve stem, so as to be contacted with by the end of a thumb screw, by the adjustment of which toward and from said end of the lever, the movement of the needle valve may also be varied.

The device is also provided with lock other is threaded upon the stem of the air intake valve, for locking the thumb screw and the collar of the air intake valve in their adjusted positions.

Anotherprovision is that of securing a collar upon the needle valve stem adjust ably, adapted to be contacted with by the forked end of the pivoted lever, adapted to be actuated by a rod or wire, or the like, so

as to open the needle valve to admit gasolene to the carbureting chamber, in case the tapered seat.

- The throttle valve is so arranged relative to its seat, as to permit the same to be adjusted, in order to compensate for wear and the like, or to cooperate with uniformity relative to its seat.

Means is also provided for adjusting the throttle valve relative to its seat.

A further object of the invention is the provision of novel means for actuating the throttle valve.

Another object of the invention is the provision of a series of ports adapted to be controlled by the throttle valve, in order to admit of a supplemental supply of air. In other words, upon opening the throttle valve and subsequently to the responding of the carbureter to the suction of the engine, and after the engine is underway, a supplemental intake of air is admitted through the supplemental ports, thereby thinning the consistency of the charge, it having been found that after starting of the engine and the automobile is under way, the speed of the engine as well as the automobile will be increased. In other words, the throttle valve performs two functions, namely, the controlling of the charge to the engine, and the controlling of an extra or supplemental intake of air, in order to thin the charge.

A means is provided such as a spring or the like, which not only normally seats the needle valve, but also normally seats the air intake valve.

Another provision for the device is that of a sight feed glass or nipple located in the gasolene supply pipe from the gasolene tank, in order to ascertain whether or not the gasolene is properly feeding.

In practical fields it may be found necessary to subject the various features of construction, and elements thereof, to slight changes or alterations, to which the patentee is entitled, provided the alterations or changes fall within the scope of what is claimed.

The invention comprises further features and combination of parts, as hereinafter set forth, shown in the drawings and claimed.

In the drawings Figure 1 is aview in perspective of the improved carbureter, constructed in accordance with the invention.

Fig, 2 is a transverse sectional view, upon line 22 of Fig. 1, showing parts in elevation.

Fig. '3 is a transverse sectional view on line 83 of Fig. 1, showing a modified form of construction to that shown in Fig. 1, for manipulating the throttle valve.

Figy is a plan view of the improved carbureter, showing the same means, as shown in Figs. 2 and 3, for manipulating the throttlevalive.

Fig. 5 is a longitudinal sectional view upon line 55 of Fig, 1, clearly disclosing the principal features of the carbureter, as Well as the vitalinterior parts thereof.

Fig. 6 is a horizontal sectional View upon line 6-6 of Fig. 5.

Fig, 7' is a detail sectional view on line 7-7 of Fig, 5,, showing the forked end of the lever engaging the grooved collar on the stem of the air intake valve.

Referring more particularly tothe drawing s 1 designatesthe casing of the improved carbureter having a carbureting chamber 2, into which the gasolene and the fumes therefrom are allowedto enter, by way of the passage 3. Located in the chamber 2 is a series of screen members or other suitable perforated plates 4, for the purpose of breaking, up the gasolene or the particles thereof into. infinitesimal. parts. The main supply. ofair admitted by the opening of the air intake valve 5 thoroughly mixes with the gasolene and the fumes therefrom prior to passing through the screens or perforated members 4. The charge after passing through said screens or members 4 passes into andthrough the manifold pipe or conduit 6, which is adapted to connect to the cylinders. (not shown) of the engine (not shown), The valve 5 normally contacts with the valve seat 7. This valve 5 opens and closes, owing to the suction in the cylinders of the engine, that is, when the open ings 8 of the throttle valve 9 are thrown in registration with the openings 10 of the headllofthe carbureter casing. This head 1-1 is bolted or otherwise secured to the casing 1 by the bolts 12, which also secure the manifold pipe 6,. owing to the provision of the cars. 13, to the head 11, there being nuts 14 threaded upon said bolts. A suitable packing gasket or the like 15 is interposed between the end of the manifold'pipe or conduit and the head 11 of the carburetor. This throttle valve 9 is ground or otherwise seated in a tapering seat 16, being held in place by the bolt or member 17 and thumb nut 18, by the adjustn'ient of which, the throttle valve may be adjusted in position relative to the seat 16, in order to compensate for wear and the like. The throttle valve 9 is preferably circular .in contour, and is provided with a radial arm 19, extending through a segmental slot 20 of the head 11. Projecting upwardly from the casing 1 is a boss or lug 21 having. a reduced portion 22, on which a bell crank lever 23 is fulcrumed. One arm of this bell crank lever, designated by the numeral 2 1, is provided with a slot 25,through which the arm 19 of the throttle valve extends. To manipulate the bell crank lever, a rod or the like 26 is pivoted at 27 to the arm 28 of the bell crank lever, for the purpose of rocking the throttle valve 9, whereby the openings 8 and 10 may be thrown into and out of registration, so as to control the charge to the engine (not shown) through the manifold pipe or conduit 6.

The head 11 is provided with a series of ports 29, adapted to admit of an additional or supplemental supply of air to mix with the charge prior to passing through the manifold conduit, the result of which in creases the power of the engine, which in turn increases the speed of the automobile or other machinery. This extra or supplemental supply of air is admitted subsequently to the opening of the throttle valve, which allows the carbureter to respond to the suction in the engine, in other words, allows the charge to be sucked into and through the manifold conduit. sion of this sl'lpplemental supply of air subsequently to the suction of the charge is. accomplished, owing to arranging the ports 30 of the throttle valve in staggered relations to the openings 8 whereby the ports 10 are first uncovered and then the ports 29 begin to be uncovered.

In Fig. 4, however, the throttle valve 9 is manipulated in a differentmanner to that shown in Fig. 1. A rod or wire 31 in Fig. 4 is connected direct to the arm 19, as shown at 32. Either one of the rods 26 0131 may be operated in any suitable manner and by any suitable mechanism (not shown), adapted to be located at any suitable location in close position to the chauffeur of the auto mobile or the operator of the engine.

An auxiliary supply of air is admitted through the pipe into the carbureting chamber, in order to mix with the gasolene, prior to penetrating the screens or other perforated members. 4., A suitable gauze or The admisscreen covering 34 is provided upon the flared end 35 of the pipe 33, in order to prevent dust or other foreign particles from entering the carbureting chamber through the pipe 33.

The air intake valve 5 is provided with a valve stem 36, slidably mounted in a bearing '37, which preferably forms an integral part of the casing 1, as clearly shownin Figs. 4, 5 and 6. The greater part of the stem 36 is constructed with threads 38, which are engaged by the collar 39. This collar is held in adjusted positions upon the stem 36, by virtue of the set screw or the like 40. The purpose of the collar 39 is to limit the valve 5 in opening, by contacting with one end of the bearing 37. In other words, by adjusting-the collar 39 nearer the bearing 37, the valve 5 will not open to a great extent, and by adjusting the collar farther from the bearings, the opening of said valve 5 may be increased.

Also threaded upon the valve stem 36 is a collar 41 having an annular groove 42. Extending laterally from the casing 1, and secured thereto in any suitable manner is a post or projection 43 having a bifurcated end 44, in which a lever 45 is pivoted by means of a cotter pin, or ordinary pin, bolt or the like 46. This lever 45 is constructed with a forked end 47, the ends of which fork are provided with inwardly directed lugs 48 engaging the groove 42 of the collar 41. A lock nut 49 is adapted for locking the collar 41 in its adjusted positions upon the valve stem 38.

The passage-way 3 of the casing 1 may be constructed in any suitable manner. However, in the present instance, the same is formed by drilling transversely of the ex tension or supplemental casing 50 of the casing 1, and subsequently inserting a threaded plug 51. In this extension or supplemental casing 50 a nipple 52 having a sight feed glass 53 is threaded, as at 54. The gasolene supply pipe 55 from the gasolene tank, (not shown) is threaded into the nipple 52. This construction of nipple and sight feed glass, in practice, may be varied. Leading from the nipple 52 and through the extension or supplemental casing is a passage 56 having a needle valve seat 57, with which the needle valve 58 eotiperates, in order to control the inflow or intake of the gasolene through the passage 3. The stem 59 of the needle valve 58 is mounted in a guide bearing 60 of the supplemental casing 50, and passes through a packing gland or box 61. This packing gland or box is formed or arranged in the plug 62, which is threaded or otherwise secured at 63 in the supplemental casing 50. Extending transversely of the needle valve stem 59 is a pin 63, against which an annular ring 64 is arranged. In lieu of the pin and the ring 63 and 64 a collar or the like may be threaded to the needle valve stem. Interposed between the ring 64. and the plug 62 is a coil spring 65, which not only holds the needle valve normally seated, but also holds the air intake valve normally seated, owing to the connections to be hereinafter set forth, between the needle valve stem and the lever 45. Adjustably or otherwise suitably secured upon the needle valve stem, say,

for instance, by means of a thumb screw or the like 68 is a collar 69, with which the forked end 70 of a lever 71 contacts, in order to unseat the needle valve, in order to admit of a supply of gasolene through the passage 3, for priming the carbureter. In other words, to allow the engine to start. The lever 71 is pivoted at 72 to an arm 73, integrally or otherwise connected to the casing 1. This lever 71 may be oscillated upon its pivot by any suitable means, such as a rod 74. The needle valve stem at its exterior end is constructed with an enlargement 7 5 having an elongated slot 76, through which the end 77 of the lever 45 extends. Threaded or otherwise passing through one end of the enlargement 45 is a thumb screw 78, so arranged as to contact with the end 77 of the lever 45. By adjusting the thumb screw .78, the opening of the needle valve may be varied, relative to the opening of the intake valve 5, in order to vary the intake of a supply of gasolene, relative to the intake of a supply of air into the carbureting chamber. The thumb screw 78 is held in adjusted positions, by virtue of the lock nut 79. The varying of a supply of gasolene relative to a supply of air by. way of the valve 5, may also be accomplished by the adjustment of the collar-41, which is perfectly obvious.

In the operation of this improved carbureter, the throttle valve is first opened, and through the suction of the engine, a thoroughly mixed charge is sucked through the screens or other perforated members 4 from the carbureting chamber, into the manifold conduit 6, to the cylinders of the engine, and in so doing the air intake valve 5 properly responds, in order to admit the necessary supply of air, and as the valve 5 responds, the needle valve correspondingly opens, which valve is held normally seated by the spring 65, in order to admit the required supply of gasolene. After the engine has been thoroughly started, and it is desired to run the engine on the same amount of fuel, but at a greater speed (which in turn correspondingly increases the speed of the automobile), the throttle valve 9 is further opened. In further opening the throttle valve, the ports 29 and 30 are brought into registration, which admits an extra or supplemental supply of air,

&

which greatly thins the charge, thereby allowing the engine to operate with the same amount of fuel but at a greater rate of speed. It will be seen on examining the drawings that the throttle valve performs these two functions. However, on further opening the throttle valve, no greater charge is sucked into the manifold conduit, owing to the fact that the collars 39 and ll have been previously set, as Well as the thumb screw 78.

It will be ascertained from the foregoing in conjunction with the accompanying illustrations, that there has been devised, an essentially new and useful, simple, inexpensive, and desirable form or construc tion of carbureter, and one which has been found exceedingly practical and particularly adaptable in use in connection with any form or type of engine, whether it is a stationary, marine or automobile engine or the like.

The invention having been set forth, what is claimed as new and useful is 1. In a carbureter, a casing having a substantially straight-way I carbureting chamber, a liquid fuel passage connecting with the periphery of said chambeiya disk arranged in the entrance end of said chamber, a stem connected to said disk, a valve controlling said liquid fuel passage having a stem substantially parallel to the stem of said-disk, auxiliary means for independently actuating said valve controlling the liquid fuel passage, and connecting means between the stems of said valve and disk for actuating the former upon movement of the latter, said connecting means having a lost motion connection therein to permit the independent movement of said valve con trolling the liquid fuel passage.

2. In a carbureter, a casing having a substantially straight-way carbureting chamber, a liquid fuel passage connecting laterally therewith, a valve arranged in the entrance end of said chamber, a valve con- DEAN SWIFT, ROBERT A. BoswnLL.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of latents, Washington, D. 0. r 

